Partial Discharge-Free Power Frequency Test System

Product Introduction

The intelligent control system is a highly efficient, reliable, and economical new control system developed with SIEMENS PLC at its core. The system integrates surge current and power frequency withstand voltage tests into a unified system while maintaining separate control. Extensive use of opto-isolation and switch isolation technology throughout the control system ensures the PLC's I/O operates in a fully isolated low-voltage environment, significantly enhancing the system's safety and reliability. Analog quantities such as voltage and current are processed using high-speed, high-precision digital modules with 12-bit resolution. Employing both hardware and software redundancy techniques, the entire control system achieves high precision, rapid response, and strong anti-interference capabilities. This effectively resolves interference issues such as spatial, ground potential, and power supply disturbances in high-voltage testing. Optimized human-machine interface and communication methods endow the entire control system not only with strong anti-interference capability, excellent stability, and high reliability, but also with significant scalability and robust programming and communication capabilities. This fundamentally transforms the time-consuming and labor-intensive operation of traditional control systems while greatly enhancing the repeatability and stability of test data.

Product Parameter (specification)

1. Main Technical Parameters
1.1 Transformer
Output Voltage	50kV
Rated Capacity	10kVA
Input Voltage	380V ±10%
Input Current	26.3A
Output Current	200mA
Impedance Voltage	≤10%
Output Waveform Distortion Rate	≤1%
Power Frequency Withstand Voltage Level	≥55kV/1min
Test Waveform or Voltage Amplitude	50kV power frequency sine wave, with peak-to-peak and root mean square (RMS) values within √2±0.07;
System Partial Discharge Quantity	≤2 pC at 100% rated voltage;
Complete Equipment Operating Time	Operate for 15 min at 100% rated voltage and 100% rated current; Operate for 1 min at 1.1 times rated capacity
1.2 Voltage Divider
Rated voltage	60kV
Rated capacitance	1000pF
Short-time power frequency withstand voltage	≥1.1UN
Partial discharge at 100% rated voltage	≤2pC
1.3 Protective Resistor
Rated voltage	50kV
Nominal resistance	7.5kΩ
Partial discharge	≤2pC
1.4 Power Supply Filter
Operating Voltage	0–400V
Rated Current	26.3A
Rated Capacity	10kVA
Attenuation Characteristics	10kHz–100kHz ≥45dB, 100kHz–300kHz ≥50dB, 300kHz–1MHz ≥50dB
Partial Discharge Level	≤2PC at rated voltage

Product feature and application

1. Low Partial Discharge, High Precision:

Core component partial discharge ≤2 pC, partial discharge tester sampling rate 80 MS/s, voltage/current measurement accuracy 0.5%.

2. Superior Electrical Performance:

Outputs 50kV sine wave with distortion rate ≤1%, strong anti-interference capability, suitable for diverse environments.

3. Intelligent and Convenient Operation:

Supports automatic/manual voltage ramping, segmented speed control, configurable parameters, real-time data logging and automatic saving.

4. Multi-Layer Safety Protection:

Single-point grounding, overvoltage/overcurrent protection, emergency shutdown, designated personnel operation and maintenance, compliant with safety standards.

5. Modular and Easy Maintenance:

Clearly defined component roles, stable structure, convenient transportation and storage, and easy fault localization.

6. Flexible Communication Expansion:

Supports 4G/5G, Wi-Fi, and Bluetooth with ample hardware configuration and strong expandability.

Prodection details

Suitable for scenarios with stringent partial discharge requirements and the need for power frequency withstand voltage testing, covering factory acceptance testing, type testing, and on-site maintenance of medium- and high-voltage electrical equipment (such as transformers, capacitors, etc.).

Company Qualifications

FAQ

1)What are the grounding requirements for the MEWJF-W10kVA/50kV partial discharge-free power frequency withstand voltage test system?

Answer: This system employs a single-point grounding design. A reliable grounding point must be established with grounding resistance less than 0.5Ω. Before connecting any equipment to input or output terminals, ensure the equipment is properly grounded. Strictly adhere to the single-point grounding principle throughout the process to prevent safety hazards caused by multi-point grounding.

2)What environmental restrictions should be observed for the transportation and storage of the MEWJF-W10kVA/50kV Partial Discharge-Free Power Frequency Withstand Voltage Test System?

Answer: Components must be securely packaged during transport to prevent severe impact. Storage requires a dry, clean indoor environment, avoiding outdoor placement. Ambient temperature must not exceed +45°C or fall below -25°C, with humidity not exceeding 90%. The area must be free of flammable, explosive, or corrosive substances and conductive dust, with the floor level not exceeding 3 degrees tilt. When relocating the equipment to a different environment with a relative temperature difference exceeding 25°C, allow it to acclimate for 12 hours before use.

3)How should faults be handled when the MEWJF-W10kVA/50kV Partial Discharge-Free Power Frequency Withstand Voltage Test System malfunctions?

Answer: If equipment damage or malfunction is suspected, immediately cease operation and refrain from further use. Equipment repairs must be performed by manufacturer-authorized technicians; users must not disassemble or attempt repairs themselves. During a fault, consult the fault indicator signal on the control console for specific issues while promptly contacting the manufacturer to report the situation and await professional maintenance.

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